package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /*
     * 指定时间的营业额统计
     * */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的营业额的集合
        List<Double> turnoverList=new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询date日期对应的营业额，状态为已完成
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover= turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);

        }



        //封装返回结果
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();







    }

 /*
 *
 * 用户统计
 * */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
       //存放从begin,end之间的日期
       List<LocalDate> dateList=new ArrayList<>();


       dateList.add(begin);


       while(! begin.equals(end)){
           begin=begin.plusDays(1);
           dateList.add(begin);

       }

       //存放每天的新增用户数量
        List<Integer> newUserList=new ArrayList<>();
       //存放每天的总用户量
        List<Integer> totalUserList=new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map=new HashMap();
            map.put("end",endTime);

            //查询总用户数据
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin",beginTime);

            //查询新增用户数量
            map.put("end",endTime);
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);


        }


        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,",")).build();
    }



    /*
    *
    * 订单统计
    * */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //存放begin,end之间的日期
        List<LocalDate> dateList=new ArrayList<>();


        dateList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的订单总量
        List<Integer> orderCountList=new ArrayList<>();
        //存放媒体的有效订单量
        List<Integer> validOrderCountList=new ArrayList<>();


        //遍历dateList集合，查询每天订单有效数和订单总数
        for (LocalDate date : dateList) {
            //查询每天的订单总数 select count(id) where order_time> ? and order_time<?
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);



            //查询每天订单的有效数 select count(id) where order_time> ? and order_time<? and status=5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);


        }

        //计算时间区域内的订单总数据
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();


        //计算时间区域内的有效订单数据
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();


        Double orderCompleteRate=0.0;
        if(totalOrderCount !=0){
            //计算订单完成率
            orderCompleteRate=validOrderCount.doubleValue()/totalOrderCount;


        }

       return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompleteRate)
                .build();
    }




    /*
    * 根据条件统计订单数量
    * */
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        Integer count = orderMapper.countByMap(map);
        return count;


    }


    /*
     * 统计排名前十商品
     * */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList= StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");


        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /*
     *
     * 导出运营数据报表
     * */
    @Override
    public void exportBusinessData(HttpServletResponse response) throws IOException {
        //查询数据库，获取营业数据--查询最近30天的运营数据
        LocalDate beginTime = LocalDate.now().minusDays(30);
        LocalDate endTime = LocalDate.now().minusDays(1);


        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(beginTime,LocalTime.MIN),LocalDateTime.of(endTime,LocalTime.MAX));

        //通过POI将数据写入到excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/fhp.xlsx");

        //基于模板创建一个excel文件
        XSSFWorkbook excel=new XSSFWorkbook(in);

        //获取表格文件的sheet页
        XSSFSheet sheet= excel.getSheet("Sheet1");

        //填充数据--时间
        sheet.getRow(1).getCell(1).setCellValue("时间："+beginTime+"至"+endTime);

        //获取第4行
        XSSFRow row=sheet.getRow(3);
        row.getCell(2).setCellValue(businessDataVO.getTurnover());
        row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
        row.getCell(6).setCellValue(businessDataVO.getNewUsers());


        //获取第5行
        row=sheet.getRow(4);
        row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
        row.getCell(4).setCellValue(businessDataVO.getUnitPrice());


        //填充明细数据
        for (int i = 0; i < 30; i++) {
            LocalDate date=beginTime.plusDays(i);
            //查询某一天的营业数据
            BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));


            //获得某一行
            row=sheet.getRow(7+i);
            row.getCell(1).setCellValue(date.toString());
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(3).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(5).setCellValue(businessData.getUnitPrice());
            row.getCell(6).setCellValue(businessData.getNewUsers());
        }


        //通过输出流将excel文件下载到客户浏览器
        ServletOutputStream out = response.getOutputStream();

        excel.write(out);


        //关闭资源
        out.close();
        excel.close();


    }

}
